体育运动训练竞赛中疲劳类型及其解决途径     

申德山 《当代体育科技》2021,(7):18-19,22

近年来,体育运动愈来愈受到人们的关注和青睐,在体育运动训练与竞赛中产生运动疲劳是身体运动到一定程度从而引起组织器官机能下降的一种正常生理现象,然而当运动负荷超过人体的机能承载能力时,就会让人呼吸变得急促、肌肉酸痛、反应迟钝,必须经过一段时间恢复才能继续运动,所以如何消除疲劳感是体育训练中需要重点解决的问题。基于此,该文对体育运动训练中常见的疲劳类型和判断方法进行了分析,并提出了相应的解决措施,帮助消除疲劳感和提高身体素质。  相似文献   

Impact of information use architecture on load and usability     

Chikezie Okike  Kiran Jude Fernandes 《Information processing & management》2012

Information use is defined as the application of acquired and transmitted information in the decision making of an organization at the strategic and tactical levels. The purpose of the research is to investigate how information use architecture impacts information load and usability at the operational level of manufacturing where machines, humans and the production processes are information users. A new approach to information load is introduced which takes all the characteristics of information use (tacit, mechanical, paper and digitized) and possibilities of users (machine, operator and process) into consideration. Information use nodes are conceptualized building blocks for information use architecture which impact information load and usability. The results suggest that information use load is sensitive to information encoding/decoding. A combination of the federated and integrated information use architectures tends to result in a low information use load and can become a strategic tool for waste reduction. How information usability relates to load varies depending on the usability characteristic in view. The major conclusion is that a holistic approach to information systems includes the consideration of information use architecture which is an important factor in the management of information load and usability at the operational level.  相似文献   

关系嵌入、结构嵌入与知识整合效能:人—环境匹配视角的分析框架   总被引：1，自引：0，他引：1  

张利斌  张鹏程  王豪 《科学学与科学技术管理》2012,33(5):78-83

社会网是研究知识管理的重要视角,以往研究多从正面效应进行探讨,而忽略了个体因素所发挥的能动作用。因此,从社会网的关系嵌入和结构嵌入两个方面,构建了一个更加均衡的模型,论述了社会网在促进知识整合与合作满意度的同时,也存在增加角色负荷的潜在消极作用。从人—环境匹配角度强调了个体与社会网的互动机制,揭示了个体通过能力和价值观的调整,使得社会网对知识整合的作用得以实现的过程。  相似文献   

集群数据库系统多指标动态负载均衡方法的设计与实现     

殷佳欣  陈驰 《中国科学院研究生院学报》2012,29(1):94-100

负载均衡是提高数据库集群系统整体性能的重要技术手段之一,其核心在于如何对实际到达的任务进行合理的动态分配.在对比分析现有数据库集群系统的负载均衡方法的基础上,提出一种新的多指标动态负载均衡方法.该方法对后端数据库节点的多个性能指标进行采样,使用多指标决策方法TOPSIS计算各个节点负载情况,用负载最轻的节点作为决策结果.实验结果表明:与传统负载均衡方法比较,该方法可显著提高集群数据库系统的整体性能.  相似文献   

民用飞机货舱系留系统静强度设计     

郭晓宁  张绪 《中国科技信息》2012,(19):88-89

介绍了民用飞机货舱系留系统静强度设计的适航标准要求和设计载荷。以某型飞机货舱系留系统静强度设计为例,介绍了货舱系留系统的静强度分析和试验验证方法。试验得到界面载荷值和理论分析得到界面载荷值对比分析表明对货舱系留系统的分析方法保守,其设计满足静强度要求和适航条款要求。  相似文献   

负载自适应的CoMP调度策略   总被引：1，自引：0，他引：1  

张金柱  洪佩琳  薛开平 《中国科学院研究生院学报》2012,29(5):644-651

研究LTE-A下行CoMP调度技术.针对系统负载差异的场景,说明单一CoMP调度模式的缺陷;同时针对2类CoMP技术,给出相应地提高小区边缘和小区整体吞吐量的调度策略.通过理论分析和系统级仿真验证,研究系统负载对调度策略性能的影响,最后提出一种能自适应于非均衡负载的CoMP调度策略.综合评估表明,CoMP联合传输在低负载下和CoMP协调调度在高负载下均具有较优性能,而优化策略复杂度低,且能适应系统负载变化,可进一步提高系统性能.  相似文献   

Cognitive Aging and Computer-Based Instructional Design: Where Do We Go From Here?   总被引：1，自引：0，他引：1  

Pascal W. M. Van Gerven  Fred Paas  Huib K. Tabbers 《Educational Psychology Review》2006,18(2):141-157

In this article, themost relevant literature on cognitive aging and instructional design is merged to formulate recommendations for designing computer-based training material aimed at elderly learners. The core message is that researchers and instructional designers do not need to develop special computerized instruction for older adults. Rather, existing principles of general instructional and multimedia design can be evaluated and used to accommodate the needs of elderly learners. Particular attention is given to John Sweller’s Cognitive Load Theory (CLT) and Richard Mayer’s Cognitive Theory of Multimedia Learning (CTML). It is argued that these instructional theories bear important benefits for older learners because they support an efficient use of available cognitive resources. New research directions are suggested to test the implications of these theories for learning in old age.

Pascal W. M. Van GervenEmail:

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Cognitive load and knowledge sharing in Learning Networks     

Ya P. Hsiao  Francis Brouns  Liesbeth Kester  Peter Sloep 《Interactive Learning Environments》2013,21(1):89-100

Learning Networks (LNs) are online social networks designed to support nonformal learning; they are therefore particularly suitable for self-directed learners. In LNs, learners need to construct knowledge through knowledge sharing with other participants. However, without support, learners have to organize knowledge sharing themselves and this could induce extraneous cognitive load. When working on complex learning tasks, this organizing process could have a detrimental effect on knowledge construction. To optimize cognitive load, we propose using a peer support system that applies the mechanisms of peer tutoring to support knowledge sharing. Its mechanisms reduce, we argue, the extraneous load imposed by having to organize knowledge sharing as well as induce germane load by directing the freed-up cognitive capacity to processes that contribute to knowledge construction.  相似文献   

动静组合加载下花岗岩损伤断裂特征     

万国香  王其胜 《嘉应学院学报》2013,31(2):37-39

在霍普金森试验系统上进行了花岗岩破坏的动静组合加载实验,根据实验结果,分析了岩石在动静组合加载下损伤断裂机制与特征.结果表明,不同动静组合加载下岩石破碎的粒度分布具有明显的率变效应;采用张开位移法计算出了岩石破裂时裂纹的宽度.  相似文献   

拱型波纹屋盖风荷载数值模拟研究   总被引：1，自引：0，他引：1  

张德生 《嘉应学院学报》2013,(8):44-50

基于谐波叠加法的基本原理,结合快速傅立叶变换,利用MATLAB编写了拱型波纹屋盖多点互相关的脉动风速程序.程序运行结果表明,结构各点模拟脉动风速时程的功率谱密度函数与目标函数、风速时程的自相关函数与目标自相关函数较为一致;相邻两点之间距离越近,互相关性越强,反之,则越弱.该研究结果对进一步研究拱型波纹屋盖结构风致振动时域分析具有重要意义.  相似文献